64353572805661 has 8 divisors (see below), whose sum is σ = 65708458770240. Its totient is φ = 63012727110432.

The previous prime is 64353572805607. The next prime is 64353572805779. The reversal of 64353572805661 is 16650827535346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64353572805661 - 2⁹ = 64353572805149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64353572805661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64353572805461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3510058075 + ... + 3510076408.

It is an arithmetic number, because the mean of its divisors is an integer number (8213557346280).

Almost surely, 2^{64353572805661} is an apocalyptic number.

It is an amenable number.

64353572805661 is a deficient number, since it is larger than the sum of its proper divisors (1354885964579).

64353572805661 is a wasteful number, since it uses less digits than its factorization.

64353572805661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7020134675.

The product of its (nonzero) digits is 108864000, while the sum is 61.

The spelling of 64353572805661 in words is "sixty-four trillion, three hundred fifty-three billion, five hundred seventy-two million, eight hundred five thousand, six hundred sixty-one".